Tidy the metadata bottom right-click

[rdstern]

There are three items here, either to be taken together, or as separate pull requests.

1. @Fidel365 here is the bottom metadata right-click menu currently:

You have just tidied the data frame right click from the data window. I suggest it should be the same from here.

So get rid of the View Data option, and reorder the others so they are identical to the one you tidied earlier.

2. At the same time the option for the R-viewer, in the toolbar, ignores the meta-data window. Could it either:
   a) Show the data for the window - data or metadata - that has the current focus, Or
   b) If that is difficult, then (as now) show the window for the data view, unless that is closed. If closed, then it shows the data corresponding to the current metadata?

3. When implementing the R-viewer from the toolbar it still says:

# Right click menu: View R Data Frame in the output window.

Of course it is no longer a Right click menu. So now it could either say #Toolbar Option: View R Data Frame, or just #View R Data Frame

Thanks